My Original Propeller that came with my Honda BF20 was SIZE 9 1/4 x 10 INCHES (235 x 254 mm), i purchased a spare one BUT forgot to mention the size to the supplier, they sent me SIZE 6 1/2 x 10 INCHES (165 x 254 mm).
What will be the difference in performance? Should i return it and ask for the right size or just keep it if its better size.
OK I think it is likely the original one was a 9.25" dia and 10" pitch which is pretty standard for a 20hp and suits most situations.
Then it seems your new one is a 10" dia with a 6.5" pitch. You should be able to tell if the prop looks broadly the same dia as the old one to confirm this.
Assuming so 6.5" is a tiny pitch for a 20hp and like trying to drive on main roads in second gear. It would only suit a river boat or coastal launch that would never plane but needed 'lower gearing' to move a fair bit of weight.
Wow, thanks for that very clear explanation. For that, i will return it to them. This forum is amazing specially when theres a member like you "Fenlander". Thank you so much
No problem. I'm early retired and added to that undertake an activity in my spare time that needs frequent PC access through the day so if I know an answer I'm in there... if I don't I keep out and don't make it up!
spy-sea-one
